public void Test_AddDepartureCity_AddsDepartureCityToFlight() { //Arrange DateTime departureTime = new DateTime(2017, 3, 14, 9, 30, 0); string flightStatus = "On Time"; Flight testFlight = new Flight("AX5390", departureTime, flightStatus); testFlight.Save(); City departureCity = new City("Seattle"); departureCity.Save(); //Act testFlight.AddDepartureCity(departureCity); List <City> result = testFlight.GetDepartureCity(); List <City> testList = new List <City> { departureCity }; //Assert Assert.Equal(testList, result); }